diff --git a/README.md b/README.md
index fac07e2..f7fc896 100644
--- a/README.md
+++ b/README.md
@@ -54,7 +54,9 @@ FAQ
 ### Why must `zsh-syntax-highlighting.zsh` be sourced at the end of the `.zshrc` file?
 
 `zsh-syntax-highlighting.zsh` wraps ZLE widgets.  It must be sourced after all
-custom widgets have been created (i.e., after all `zle -N` calls).
+custom widgets have been created (i.e., after all `zle -N` calls and after
+running `compinit`).  Widgets created later will work, but will not update the
+syntax highlighting.
 
 How to tweak
 ------------